Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"den nhan dot snippets" » "de nhan dot snippets", "benh nhan dot snippets", "dung nhan dot snippets", "den nhan dat snippets", "den nhay dot snippets", "den nhan dong snippets"
"locating bug code snippets" » "locating bung code snippets", "locating bugs code snippets", "locating bug core snippets"

Try widening your search to All Fields.

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (((("den nhan dot snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("den nhan dot snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( den nhan dot snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("den nhan dot snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.